Propeller.



PATENTED DEC. 31, 1907,

A. A. ANDERSON.

PROPELLER.

APPLIOATION FILED JULY 26, 1907 Fci 4% Z6 S vwan tor AlhnAAndensom attain ALBIN A. ANDERSON, OF ME nnEBnAsKA;

PRoPEnLER.

m. erases.

jTo all' concern Be it known, that I, Arum A. Amnnnso v, a -citizen ofthe United States, residing at Mead,

fin. thecounty of" Saunders andState of Nebraska, have invented new and useful Im-' provements in Propellers, of which the fol-' owing is a specification.

This invention relatesto an improvement propellers, designedprimarily for useon f flying machines. or air s psi The main object of the presentinventicn is "the'provision of means for mounting the propellers for operation in reverse directions and to so connectthe bladesof the respective propellers as to'permit their convenient ad,

justme'nt' to alter their relative inclinations.

f The invention-will first bedescribed inthe following specification, reference being had q yparticularly tothe' accompanying drawings,

207m which:

. Figure lis'a view elevation illustrating *myimproved'propelling mechanism. Fig. 2 is 'a'fpIan of one of the head'blocks showing the means for attachment of the blades there to.) )Figf. "3 is a side elevation of-the same.

Big-#1. is anenlarged section on line 454 of 1. I a eferring articularly to the drawings, wherein. simi ar reference numerals indicate like parts throughout the several views, my inyfintiorigcomprises a main frame including a baseplate 1 designed to be secured to any structure, and a skeleton supporting frame 2 rising from the base-plate. A main shaft 3 "sfiggis revolub lg supported in the'base-plate rising "throng and projecting beyond the-suppo'rtingframe 2. A sleeve 4 is arranged to encircle the main shaft, being revolubly supported'in the frame 2 and held against'independent longitudinal movement by collars 5,

which, if desired, may form cones or caps of an ordinary ball bearing to guard againstundue friction in'the revolutionof the same. An .electromotor 6 ,is mountedwithin the skeleton frame 2 the armature 7 of said motor being fixed to the main shaft 3, and the field 8 being relatively fixed to the sleeve 4 and through the medium of hangers 9, the latter preferably extendin below the field and'being arranged to. su port the brushes 10, being properly insulat d therefrom. Gollector rings 11 and 12 are mounted on-the main shaft 3, to which rings a current is supplied from any source of energy through con uctors 13- and brushes 14. The currentis led from the collector rings 15 to the field Specification of Letters Patent; idpplioationfiladJuly26|1907. Serial No. 385.702.

blade sup ortin portion of said rod at an Patented Dec. 31,1907.

.respectively, secured to the respective shaft and sleeve. Blades 19' are secured to the .head blocks, these blades being mounted in each block in an identical manner.

. Referring particularlyto Fig. 2, it-willbe notedthat t e blade comprises an approxi mately triangular strip 20, referably of alliminium or-similar materia securedat the sideed es to rods21, 22 terminally mounted in the lock. The-rod 21 is'approximatel .straight from its connection with the bloc to the outer terminal, while the rod 22' is formed with a bend at 23 adjacent its connection withthe block. The blade 20 terminates at its inner end adjacent the end 23 of the rod 22, the side edgesof the blade being secured to the rods through the medium of holdin members24. These members comprise -e ongated strips bent into ring form to encircle the rods and projected from the ring to form leaves 25 to bear upon the IGSPBO131V611P er and lower surfaces of the blade, as clear y shown in Fig. 3. The inner ends of the rods 21 and-22 seat in holes drilled through the head block, and set screws 26 are threaded throughtheup er surface of the block to bear upon the S00 et receiving ends of the rods. It is thus ob vious'that the'rods may be turned in their socket bearings secured in adjustable position through the medium of the set screws 26. The bend 23. in the rod 22 projects the an le to t 'e ro 21,'so that turnin of the ro 22 in its socket will alter the e evation v of the free end .of said rod, .and thereby vary the angular inclination .or pitch of the blade, as will be obvious. i The construction described, therefore ,'pro-' vides a pro ellin mechanism comprising two series 0 bla es, one 'mountedu on a shaft and the other .upon an enve oping; sleeve. The motive power for the respective motor having the armature supported upon series of blades is provided in the. use of. a 5

the shaft and the field supported upon the sleeve, though the reverse of this arrangement is obviously-equivalent and contemplated herein.

The s ecific connection of the blades .to the hea blocks provides for the ready and convenient adjustment of any or all of said blades toalter their pitch or inclination with particular regard to the work to be performed. 7

The head blocks shown are square in lan, with but two blades connected to each b ock.

, It is, however, obvious that saidblocks may,

without departing from the spirit of the invention, be-variedin outline and in nurngier 12f blades be separated from the same Having thus described the invention, what I claim is:-

1. A propeller comprising a main shaft and enveloping sleeve therefor, an electromotor having the field connected to the sleeve and the armature connected to the shaft, a head block secured to the shaft, a head block secured to the sleeve, and a blade tprojectingfrom each of said blocks, said lade comprising spaced rods anda stri secured between the rods, one of the ro being straight throughout its length and the other formed with'a bend adjacent the conto nection with the'block.

2. A propeller comprising a revolving element, 9. head block secured thereon, and a blade projecting from said block, said blade comprising spaced rods and a strip secured between the rods, one of the rods being' straight throughout its lengthand the other formed with a bend adjacent the connection 11 with the block, and means for 40 independent adjustment of the rods. I a

3. A propeller comprisin a revolving ele ment, a head blocksecure thereon, and a I blade projecting from said block, said blade compnsinghspaced rods and a strip secured.

between t e rods, one of the rods'being straight throughout its length and the other formed with a bend ad; acent the-connection I,

or mountin the rods, in the block to permit their in e'pendent with the block, means 'ustment', and meansfor securing said against movement at In testimony whereof, ture-in presence of two witnesses. Y ALBIN A. ANDERSON;

Witnesses: L i @A'NTON' A wrcxumn,

GwSODEBBER Gi ad ro 

